His love of astronomy began at the age of six and that childhood curiosity developed into a lifelong passion.
It was a passion he shared through his programme, The Sky at Night, which he presented for more than 50 years, only ever missing one episode due to illness.
Patrick Alfred Caldwell-Moore was born at Pinner, Middlesex on 4 Mar 1923.
Heart problems meant he spent much of his childhood being educated at home and he became an avid reader.
His mother gave him a copy of GF Chambers' book, The Story of the Solar System, and this sparked his lifelong passion for astronomy.
He was soon publishing papers about the moon's surface, based on observations made with his first three-inch telescope. His 1908 vintage typewriter enabled him to publish more than a thousand books on subjects ranging from astronomy, his first love, to cricket, golf, and music.